Picture a packhouse worker who has spent a decade doing the same motion. Grip, twist, place. Thousands of times a shift. For years nothing happens. Then the hand starts tingling at night, the grip weakens, and eventually there is a diagnosis: a compression syndrome, the family of injuries that includes carpal tunnel. No accident report. No single moment where it went wrong.

That worker is one of 486 people who lodged a gradual onset compression syndrome work injury claim in New Zealand in 2024, the most recent year of published figures. (Source: Stats NZ, work-injuries-by-industry) It is the highest annual count in fifteen years. You have to go back to 2009, when the figure was 555, to find a bigger one.

What makes this stand out is the direction of travel. Compression syndrome claims collapsed in the early 2010s, bottoming out at just 150 in 2013. That is less than a third of last year's count. They climbed back through the middle of the decade, plateaued around 320 to 360 through the late 2010s and the COVID years, then jumped again: 453 in 2022, 444 in 2023, and 486 in 2024.

The last three years have produced the three highest counts since 2010. Whatever caused the early-2010s dip, it has not held.

Gradual onset injuries deserve more attention than they get, because they are the ones that do not announce themselves. A fall off a ladder is obvious, investigated, and fixable. A nerve slowly crushed by fifteen years of repetition is nobody's incident. It is the job working exactly as designed. And by the time it is diagnosed, the damage is often the kind that surgery manages rather than reverses.

Here is the honest counter-reading, and it matters. This is a claims count, not a measure of how many hands are actually being damaged. Compression syndromes are notoriously under-reported, and the number of accepted claims depends on how many workers see a doctor, how many doctors link the symptoms to work, and how ACC's acceptance practice shifts over time. A drop from 555 to 150 in four years is far too steep to be a real change in workplace biomechanics. Something in the reporting or acceptance pipeline moved. Which means the recent rise may partly reflect that pipeline swinging back, rather than more injured workers. The count also is not adjusted for the size of the workforce, which has grown over the period.

Even allowing for all of that, a fifteen-year high is worth saying out loud. And if the rise is partly better recognition, that is not entirely bad news. Injuries that get counted are injuries that can be designed out. The ones nobody claims for just get absorbed by the worker.

My view: gradual onset injury is the blind spot in how we think about workplace safety in this country. We measure safety in falls and machinery and dramatic single events. Compression syndrome is what happens when a job is safe every single day and dangerous over a decade. The most likely reading of the 2022 to 2024 run is that this category is drifting the wrong way while attention sits elsewhere.

486 people. Each one a hand that does not work the way it used to.